So Dwarf Fortress called to me again after a long hiatus. I make a new fort, with a brook and large amounts of trees and the mineral abundance cranked up to the max...
And then I look over my area and OH MY GOD IS THAT A
The spire goes up only another z-level or two from where I showed it, but the visible addy - including the underground - is at least 40 z-levels, and the addy stops being visible at +76 but the embark goes down to -1. When I unpaused I got a 'a section of the cavern has collapsed!' warning at around z-level 81 a little to the left of the tube but no demons.
WARNING: I stopped going up at around +1006. This embark is
TALL. It's only a 3x3 embark, which might mitigate some of the height issues, but this embark is really, really tall.
If anybody wants it,
here is the embark.
Aquifers and exotic pets have been modded out via the Lazy Newb Pack.
Warm/hot, I can't remember which
Heavily forested
Calm surroundings
Mineral scarcity set to 100
Both clay and sand
A magnetite blob in the middle embark tile
The first layer stone is limestone (WHOOOOOO)
The first all-stone z-level is +111
There are no caverns, just magma that starts at +85 and goes down to +80
There are 4 addy tubes on the map, only one of which [the above-ground spire] goes above the magma sea
There are 29 levels of uninterrupted semi-molted rock and adamantine tubes
Traversable Hell has 5 z-levels.
There are forty-six (46) levels of nothing but slade and glowing pits.
There is a slowly growing list of mysterious dead units. I suspect this is linked to the caverns and the magma sea being combined.
ETA: This world seems to be gloriously bugged, in the 'magma sea emptying into Hell and other Fun things' sort of way, on several embarks tried other than this one; see various posts later on in this thread. The potentially infinite sky appears to be universal. Proceed with !!science!!, and set initial save to YES when setting down exploratory embarks.